:root {
  --ink: #061a2d;
  --ink-soft: #0c304c;
  --paper: #f5fbff;
  --paper-deep: #e7f5fb;
  --mint: #a1f0df;
  --mint-deep: #53d1d0;
  --blue: #72b9ff;
  --cyan: #4de3f0;
  --violet: #8fa8ff;
  --gold: #55b9f6;
  --gold-soft: #b8e7ff;
  --logo-filter: brightness(0) saturate(100%) invert(76%) sepia(67%) saturate(1115%) hue-rotate(155deg) brightness(101%) contrast(94%);
  --line-dark: rgba(136, 222, 255, .22);
  --line-light: rgba(35, 111, 145, .16);
  --text-dark: #12344a;
  --muted-dark: #527384;
  --serif: "Avenir Next", "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(.22, .7, .2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body { margin: 0; color: var(--text-dark); background: var(--paper); font-family: var(--sans); font-size: 16px; line-height: 1.75; letter-spacing: .01em; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
::selection { color: var(--paper); background: #258db6; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 50; top: 12px; left: 18px; padding: 10px 14px; color: var(--ink); background: var(--mint); font-size: 12px; transform: translateY(-160%); transition: transform .25s ease; }
.skip-link:focus { transform: none; }
:focus-visible { outline: 2px solid var(--gold-soft); outline-offset: 4px; }
.container { width: min(1180px, calc(100% - 96px)); margin: 0 auto; position: relative; z-index: 1; }
.section-dark { background: var(--ink); color: var(--paper); }
.section-paper { background-color: var(--paper); background-image: linear-gradient(rgba(71, 164, 211, .04) 1px, transparent 1px), linear-gradient(90deg, rgba(71, 164, 211, .04) 1px, transparent 1px); background-size: 48px 48px; }
.section-mint { background: linear-gradient(135deg, #cbf5eb, #bde7f7); color: var(--ink); }

.site-header { position: fixed; z-index: 20; inset: 0 0 auto; height: 82px; padding: 0 max(42px, calc((100vw - 1180px) / 2)); display: flex; align-items: center; justify-content: space-between; color: var(--paper); border-bottom: 1px solid transparent; transition: background .35s ease, box-shadow .35s ease, height .35s ease, border-color .35s ease; }
.site-header.is-scrolled { height: 66px; background: rgba(6, 26, 45, .94); border-color: rgba(136, 222, 255, .18); box-shadow: 0 8px 30px rgba(3, 18, 28, .3); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-logo { display: block; width: 136px; height: auto; max-height: 35px; object-fit: contain; object-position: left center; filter: var(--logo-filter) drop-shadow(0 0 14px rgba(77, 227, 240, .16)); }
.brand-footer .brand-logo { width: 156px; }
.site-nav { display: flex; align-items: center; gap: 26px; font-size: 12px; letter-spacing: .09em; }
.site-nav > a { position: relative; opacity: .67; transition: opacity .25s ease, color .25s ease, transform .25s ease; }
.site-nav > a:not(.nav-cta)::after { content: ""; position: absolute; right: 0; bottom: -8px; left: 0; height: 1px; background: var(--cyan); transform: scaleX(0); transform-origin: right; transition: transform .25s ease; }
.site-nav > a:hover, .site-nav > a.is-active { opacity: 1; color: var(--mint); }
.site-nav > a:not(.nav-cta):hover::after, .site-nav > a:not(.nav-cta).is-active::after { transform: scaleX(1); transform-origin: left; }
.site-nav .nav-cta { padding: 10px 15px; border: 1px solid rgba(164, 239, 225, .48); border-radius: 4px; opacity: .95; letter-spacing: .14em; }
.site-nav .nav-cta:hover { color: var(--ink); background: var(--mint); border-color: var(--mint); transform: translateY(-2px); }
.site-nav .nav-cta span, .button span, .text-link span, .footer-top span { margin-left: 10px; font-size: 16px; }
.menu-toggle { display: none; border: 0; background: transparent; color: var(--paper); padding: 8px; }
.menu-toggle i { display: block; width: 22px; height: 1px; margin: 6px 0; background: currentColor; transition: transform .25s ease; }
.menu-toggle[aria-expanded="true"] i:first-of-type { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] i:last-of-type { transform: translateY(-3.5px) rotate(-45deg); }

.hero { min-height: 760px; height: 100vh; max-height: 960px; position: relative; overflow: hidden; background: radial-gradient(circle at 82% 44%, rgba(31, 143, 218, .4), transparent 30%), radial-gradient(circle at 18% 8%, rgba(63, 102, 220, .16), transparent 25%), var(--ink); }
.hero::before { content: ""; position: absolute; inset: 13% auto auto 47%; width: 1px; height: 74%; background: linear-gradient(transparent, rgba(136, 222, 255, .26), transparent); opacity: .85; }
.hero-grid { position: absolute; inset: 0; opacity: .58; background-image: linear-gradient(rgba(91, 216, 235, .1) 1px, transparent 1px), linear-gradient(90deg, rgba(91, 216, 235, .1) 1px, transparent 1px); background-size: 64px 64px; mask-image: linear-gradient(90deg, transparent, #000 15%, #000 85%, transparent); }
.hero-grid::after { content: ""; position: absolute; width: 54vw; height: 54vw; right: -12vw; top: 4vh; border-radius: 50%; background: radial-gradient(circle, rgba(52, 161, 230, .3), transparent 67%); }
.hero-content { min-height: calc(100% - 120px); padding-top: 145px; display: grid; grid-template-columns: 1.12fr .88fr; align-items: center; gap: 40px; }
.hero-copy { padding-bottom: 10px; }
.eyebrow { margin: 0 0 26px; color: var(--mint); font-size: 10px; line-height: 1.6; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow em { font-style: normal; opacity: .36; margin: 0 7px; }
.eyebrow-dot { display: inline-block; width: 6px; height: 6px; margin-right: 9px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 6px rgba(164, 239, 225, .1); vertical-align: 1px; }
.eyebrow-dark { color: #4b7890; }
.hero h1 { max-width: 690px; margin: 0; color: var(--paper); font-family: var(--serif); font-size: clamp(44px, 4.8vw, 64px); font-weight: 500; line-height: 1.2; letter-spacing: -.035em; text-wrap: balance; }
.hero h1 span, h2 em { color: var(--mint); font-style: normal; }
.hero-lede { width: min(440px, 100%); margin: 30px 0 0; color: rgba(243, 250, 249, .72); font-size: 15px; line-height: 1.88; letter-spacing: .015em; text-wrap: pretty; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 21px; border: 1px solid transparent; border-radius: 3px; font-size: 12px; letter-spacing: .1em; transition: transform .25s ease, background .25s ease, color .25s ease, border-color .25s ease, box-shadow .25s ease; }
.button:hover { transform: translateY(-3px); }
.button-light { color: var(--ink); background: var(--paper); box-shadow: 0 12px 24px rgba(0, 0, 0, .14); }
.button-light:hover { color: var(--ink); background: var(--mint); box-shadow: 0 16px 28px rgba(0, 0, 0, .2); }
.button-dark { color: var(--paper); background: var(--ink); box-shadow: 0 12px 24px rgba(11, 23, 33, .12); }
.button-dark:hover { color: var(--ink); background: var(--cyan); box-shadow: 0 16px 28px rgba(11, 23, 33, .22); }
.button-disabled { color: #71857f; border: 1px solid rgba(11, 23, 33, .18); cursor: default; }
.button-disabled:hover { transform: none; }
.text-link { display: inline-flex; align-items: center; padding-bottom: 7px; border-bottom: 1px solid currentColor; font-size: 13px; letter-spacing: .04em; }
.text-link-light { color: rgba(243, 250, 249, .72); }
.text-link-dark { color: var(--ink); margin-top: 28px; }
.hero-signals { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: 510px; margin-top: 42px; border-top: 1px solid rgba(164, 239, 225, .22); }
.hero-signal { min-height: 68px; padding: 15px 18px 0 0; border-right: 1px solid rgba(164, 239, 225, .16); }
.hero-signal + .hero-signal { padding-left: 18px; }
.hero-signal:last-child { border-right: 0; }
.hero-signal strong { display: block; color: var(--paper); font-family: var(--serif); font-size: 21px; font-weight: 500; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.hero-signal span { display: block; margin-top: 5px; color: rgba(243, 250, 249, .5); font-size: 10px; line-height: 1.55; letter-spacing: .04em; }
.hero-visual { position: relative; min-height: 560px; display: flex; align-items: center; justify-content: center; }
.cell-map { width: min(600px, 100%); overflow: visible; transform: translate(6%, 2%); }
.map-nodes circle { fill: var(--cyan); opacity: .86; filter: drop-shadow(0 0 8px rgba(79, 225, 220, .58)); }
.map-nodes circle:nth-child(2n) { fill: var(--blue); }
.map-core { transform-box: fill-box; transform-origin: center; animation: cell-pulse 8s ease-in-out infinite; }
.map-core circle { fill: none; stroke: var(--cyan); stroke-width: 1; opacity: .55; }
.map-core circle:nth-child(2) { stroke: var(--paper); opacity: .78; stroke-dasharray: 2 8; }
.map-core path { fill: none; stroke: var(--paper); stroke-width: 2; opacity: .75; stroke-linecap: round; }
@keyframes cell-pulse { 0%, 100% { opacity: .86; transform: scale(.98); } 50% { opacity: 1; transform: scale(1.03); } }
.orbit-label { position: absolute; display: flex; flex-direction: column; gap: 3px; color: var(--paper); }
.orbit-label span { color: var(--mint); font-size: 10px; letter-spacing: .14em; }
.orbit-label strong { font-family: var(--serif); font-size: 20px; font-weight: 400; }
.orbit-label small { color: rgba(243,250,249,.46); font-size: 8px; letter-spacing: .08em; }
.orbit-label-a { top: 18%; left: 5%; }
.orbit-label-b { top: 6%; right: 9%; }
.orbit-label-c { bottom: 17%; right: 4%; }
.hero-visual-note { position: absolute; right: 12%; bottom: 8%; color: rgba(164, 239, 225, .5); font-size: 8px; letter-spacing: .19em; }
.hero-visual-note span { display: inline-block; width: 5px; height: 5px; margin-right: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 5px rgba(79, 225, 220, .12); }
.hero-foot { position: absolute; left: 50%; bottom: 38px; transform: translateX(-50%); display: flex; align-items: center; gap: 17px; color: rgba(243, 250, 249, .46); font-size: 10px; letter-spacing: .16em; text-transform: uppercase; }
.hero-foot-line { width: 60px; height: 1px; background: rgba(164, 239, 225, .32); }
.hero-scroll { margin-left: auto; color: var(--mint); }
.hero-scroll b { font-size: 18px; font-weight: 400; margin-left: 9px; }

.intro { padding: 150px 0 162px; }
.split-layout { display: grid; grid-template-columns: 120px 1.18fr .82fr; gap: 48px; align-items: start; }
.section-index { display: flex; align-items: center; gap: 13px; color: #4d7890; }
.section-index span { font-size: 11px; letter-spacing: .15em; }
.section-index i { width: 34px; height: 1px; background: currentColor; opacity: .7; }
.section-index small { font-size: 9px; line-height: 1.55; letter-spacing: .1em; }
.intro-copy h2, .section-heading h2, .education-copy h2, .news-heading h2 { margin: 0; color: var(--ink); font-family: var(--serif); font-size: clamp(38px, 4.2vw, 62px); font-weight: 500; line-height: 1.23; letter-spacing: -.025em; text-wrap: balance; }
.intro-copy h2 em, .section-heading h2 em, .education-copy h2 em, .news-heading h2 em { color: #258eae; }
.intro-copy .eyebrow { margin-bottom: 21px; }
.body-large { max-width: 650px; margin: 30px 0 0; color: #234c61; font-size: 17px; line-height: 1.92; letter-spacing: .012em; text-wrap: pretty; }
.body-muted { margin: 25px 0 0; color: var(--muted-dark); font-size: 12px; line-height: 1.85; letter-spacing: .01em; text-wrap: pretty; }
.info-card { min-height: 305px; padding: 30px; border: 1px solid rgba(53, 156, 205, .3); background: linear-gradient(145deg, rgba(255,255,255,.34), rgba(211,239,250,.2)); position: relative; display: flex; flex-direction: column; box-shadow: 0 18px 40px rgba(38, 121, 166, .1); }
.card-kicker { color: #3f8fb0; font-size: 11px; letter-spacing: .14em; }
.info-card-main { margin-top: 53px; }
.info-card-number { color: #2fb9c7; font-family: var(--serif); font-size: 30px; font-weight: 500; font-variant-numeric: tabular-nums; }
.info-card h3 { margin: 15px 0 12px; color: var(--ink); font-family: var(--serif); font-size: 22px; font-weight: 500; line-height: 1.45; }
.info-card p { margin: 0; color: var(--muted-dark); font-size: 13px; line-height: 1.85; }
.info-card-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: auto; padding-top: 20px; }
.info-card-tags span { padding: 7px 9px; border: 1px solid rgba(53, 156, 205, .3); color: #3f819d; font-size: 10px; letter-spacing: .03em; }
.card-source { display: flex; justify-content: space-between; align-items: center; padding-top: 19px; margin-top: 21px; border-top: 1px solid var(--line-light); color: #4e7d92; font-size: 10px; letter-spacing: .03em; }
.card-source span { font-size: 15px; }
.card-source-note { justify-content: flex-start; }
.card-source-note span { font-size: 10px; }

.science-section { padding: 145px 0 150px; }
.section-heading, .news-heading { display: grid; grid-template-columns: 120px 1fr 250px; gap: 48px; align-items: start; }
.section-heading .eyebrow, .news-heading .eyebrow { margin-bottom: 20px; }
.heading-note { margin: 62px 0 0; color: rgba(17, 66, 79, .72); font-size: 13px; line-height: 1.85; letter-spacing: .012em; text-wrap: pretty; }
.capability-grid { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 1px; margin-top: 80px; background: rgba(53, 156, 205, .26); }
.capability-card { min-height: 305px; padding: 27px 26px; background: linear-gradient(135deg, #c8f1eb, #c1e5f6); position: relative; display: flex; flex-direction: column; transition: background .3s ease, transform .3s ease, box-shadow .3s ease; }
.capability-card:hover { z-index: 2; background: #e0fbf5; transform: translateY(-5px); box-shadow: 0 14px 32px rgba(38, 121, 166, .18); }
.capability-card-feature { grid-row: span 2; min-height: 611px; background: var(--ink); color: var(--paper); }
.capability-card-feature:hover { background: #102f40; }
.capability-top { display: flex; align-items: center; justify-content: space-between; color: #397e9d; font-size: 10px; letter-spacing: .18em; }
.capability-card-feature .capability-top { color: var(--mint); }
.capability-symbol { font-size: 28px; line-height: 1; color: #36bdd0; }
.capability-card-feature .capability-symbol { color: var(--mint); }
.capability-card h3 { margin: auto 0 13px; font-family: var(--serif); font-size: 25px; font-weight: 500; line-height: 1.38; letter-spacing: -.02em; text-wrap: balance; }
.capability-card p { max-width: 280px; margin: 0; color: rgba(18, 68, 92, .76); font-size: 14px; line-height: 1.85; letter-spacing: .008em; text-wrap: pretty; }
.capability-card-feature p { color: rgba(243, 250, 249, .68); }
.capability-card:last-child { grid-column: 2 / span 2; }
.card-arrow { position: absolute; right: 26px; bottom: 24px; font-size: 23px; color: #2c9ebd; }
.capability-card-feature .card-arrow { color: var(--mint); }

.manifesto { min-height: 650px; padding: 150px 0; position: relative; overflow: hidden; }
.manifesto-noise { position: absolute; inset: 0; opacity: .4; background: radial-gradient(circle at 75% 45%, rgba(52, 161, 230, .3), transparent 26%), radial-gradient(circle at 12% 20%, rgba(125, 229, 217, .14), transparent 23%); }
.manifesto-noise::after { content: ""; position: absolute; width: 660px; height: 660px; right: -130px; top: -40px; border-radius: 50%; border: 1px solid rgba(164, 239, 225, .16); box-shadow: 0 0 0 80px rgba(164,239,225,.025), 0 0 0 160px rgba(164,239,225,.018), 0 0 0 240px rgba(164,239,225,.014); }
.manifesto-inner { display: grid; grid-template-columns: 1fr .8fr; gap: 120px; align-items: center; }
.manifesto h2 { margin: 0; color: var(--paper); font-family: var(--serif); font-size: clamp(40px, 4.8vw, 66px); font-weight: 500; line-height: 1.12; letter-spacing: -.035em; }
.manifesto-copy > p:last-child { max-width: 470px; margin: 33px 0 0; color: rgba(243, 250, 249, .72); font-size: 15px; line-height: 1.98; letter-spacing: .012em; text-wrap: pretty; }
.approach-list { border-top: 1px solid var(--line-dark); }
.approach-item { min-height: 105px; display: grid; grid-template-columns: 45px 1fr 22px; align-items: center; gap: 15px; border-bottom: 1px solid var(--line-dark); }
.approach-item > span { color: var(--mint); font-size: 10px; letter-spacing: .15em; }
.approach-item strong { display: block; color: var(--paper); font-family: var(--serif); font-size: 20px; font-weight: 500; }
.approach-item small { display: block; margin-top: 6px; color: rgba(243,250,249,.52); font-size: 12px; line-height: 1.65; }
.approach-item b { color: var(--mint); font-size: 20px; font-weight: 400; }

.education { padding: 145px 0; }
.education-grid { display: grid; grid-template-columns: .96fr 1.04fr; gap: 120px; align-items: center; }
.education-visual { min-height: 510px; padding: 40px; display: flex; align-items: center; justify-content: center; background: var(--paper-deep); position: relative; overflow: hidden; }
.education-visual::before { content: ""; position: absolute; width: 470px; height: 470px; border: 1px solid rgba(63, 147, 201, .28); border-radius: 50%; box-shadow: 0 0 0 42px rgba(63,147,201,.06), 0 0 0 90px rgba(63,147,201,.035); }
.education-orbit { width: 242px; height: 242px; position: relative; display: grid; place-items: center; border: 1px solid rgba(63, 147, 201, .68); border-radius: 50%; color: var(--ink); transform: rotate(-18deg); }
.education-orbit::before, .education-orbit::after { content: ""; position: absolute; border: 1px solid rgba(63,147,201,.38); border-radius: 50%; }
.education-orbit::before { inset: 29px -20px; transform: rotate(62deg); }
.education-orbit::after { inset: -20px 29px; transform: rotate(35deg); }
.education-orbit > span { position: absolute; width: 11px; height: 11px; background: var(--ink); border: 3px solid var(--paper-deep); border-radius: 50%; }
.education-orbit > span:nth-child(1) { top: 12px; left: 61px; }
.education-orbit > span:nth-child(2) { right: 21px; bottom: 59px; background: #51c8c7; }
.education-orbit > span:nth-child(3) { left: 28px; bottom: 35px; background: #609ee8; }
.education-orbit b { position: relative; z-index: 1; font-family: var(--serif); font-size: 26px; font-weight: 400; line-height: 1.1; text-align: center; transform: rotate(18deg); }
.education-caption { position: absolute; bottom: 26px; left: 30px; }
.education-caption span { display: block; color: #397f9e; font-size: 11px; letter-spacing: .12em; }
.education-caption strong { display: block; margin-top: 9px; color: var(--ink); font-family: var(--serif); font-size: 23px; font-weight: 500; line-height: 1.35; text-wrap: balance; }
.education-copy .section-index { margin-bottom: 55px; }
.education-copy .eyebrow { margin-bottom: 19px; }
.education-points { display: flex; flex-wrap: wrap; gap: 9px; margin: 30px 0 37px; }
.education-points span { padding: 8px 10px; color: #397a9a; border: 1px solid rgba(53, 156, 205, .36); font-size: 10px; letter-spacing: .04em; }

.news-section { padding: 128px 0 150px; }
.news-heading { margin-bottom: 70px; }
.news-list { border-top: 1px solid var(--line-light); }
.news-item { min-height: 138px; display: grid; grid-template-columns: 110px 120px 1fr 32px; gap: 35px; align-items: center; border-bottom: 1px solid var(--line-light); transition: padding .3s ease, background .3s ease; }
.news-item:hover { padding-left: 16px; padding-right: 16px; background: rgba(255,255,255,.38); }
.news-date strong { display: block; color: #3f82a4; font-family: var(--serif); font-size: 22px; font-weight: 500; }
.news-date span { display: block; margin-top: 6px; color: #738d92; font-size: 10px; letter-spacing: .12em; }
.news-type { align-self: start; margin-top: 48px; color: #397f9f; font-size: 10px; letter-spacing: .14em; }
.news-title h3 { margin: 0; color: var(--ink); font-family: var(--serif); font-size: 22px; font-weight: 500; line-height: 1.4; letter-spacing: -.015em; text-wrap: balance; }
.news-title p { max-width: 620px; margin: 9px 0 0; color: var(--muted-dark); font-size: 13px; line-height: 1.8; letter-spacing: .008em; text-wrap: pretty; }
.news-arrow { color: #2c9ebd; font-size: 22px; transition: transform .25s ease; }
.news-arrow:hover { transform: translate(3px, -3px); }

.wechat-section { padding: 130px 0; }
.contact-grid { display: grid; grid-template-columns: 1fr .75fr; gap: 140px; align-items: center; }
.contact-copy h2 { margin: 0; color: var(--ink); font-family: var(--serif); font-size: clamp(42px, 4.8vw, 66px); font-weight: 500; line-height: 1.2; letter-spacing: -.025em; text-wrap: balance; }
.contact-copy h2 em { color: #258eae; }
.contact-copy > p:not(.eyebrow):not(.contact-note) { max-width: 440px; margin: 30px 0 0; color: #2c5369; font-size: 15px; line-height: 1.9; letter-spacing: .012em; text-wrap: pretty; }
.contact-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; margin-top: 25px; }
.contact-actions .button { min-height: 43px; }
.contact-action-link { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); border-bottom: 1px solid currentColor; padding-bottom: 7px; font-size: 13px; letter-spacing: .04em; }
.contact-action-link span { color: #2c9ebd; font-size: 16px; transition: transform .25s ease; }
.contact-action-link:hover span { transform: translate(3px, -3px); }
.contact-guidance { max-width: 440px; margin: 18px 0 0; color: #5c7e91; font-size: 12px; line-height: 1.8; letter-spacing: .01em; }
.contact-note { max-width: 430px; margin: 23px 0 0; color: #5c7e91; font-size: 12px; line-height: 1.8; letter-spacing: .01em; }
.contact-details { max-width: 500px; margin-top: 28px; }
.contact-detail { display: grid; grid-template-columns: 75px minmax(0, 1fr) auto; gap: 15px; align-items: baseline; padding: 14px 0; border-top: 1px solid rgba(11, 23, 33, .16); }
.contact-detail:last-child { border-bottom: 1px solid rgba(11, 23, 33, .16); }
.contact-detail > span { color: #397f9f; font-size: 12px; letter-spacing: .04em; }
.contact-detail strong { color: var(--ink); font-size: 15px; font-weight: 500; line-height: 1.7; }
.contact-detail b { color: #2c9ebd; font-size: 16px; font-weight: 400; transition: transform .25s ease; }
.contact-detail:hover b { transform: translate(3px, -3px); }
.contact-qr-stack { display: grid; gap: 18px; }
.wechat-card { min-height: 440px; padding: 27px; border: 1px solid rgba(53, 156, 205, .28); background: linear-gradient(145deg, rgba(255,255,255,.36), rgba(211,239,250,.2)); box-shadow: 0 18px 42px rgba(38, 121, 166, .12); transition: transform .3s ease, box-shadow .3s ease, background .3s ease; }
.wechat-card:hover { transform: translateY(-4px); background: rgba(255,255,255,.48); box-shadow: 0 24px 48px rgba(38, 121, 166, .18); }
.wechat-card-head { display: flex; justify-content: space-between; color: #3f82a4; font-size: 11px; letter-spacing: .11em; }
.wechat-card-head span:last-child { color: var(--cyan); }
.qr-image-wrap { width: 230px; height: 230px; margin: 32px auto 25px; padding: 9px; background: #fff; border: 1px solid rgba(11, 23, 33, .18); border-radius: 5px; box-shadow: 0 14px 28px rgba(11, 23, 33, .12); }
.wechat-qr { display: block; width: 100%; height: 100%; object-fit: contain; image-rendering: auto; }
.wechat-card > p { margin: 0 auto; max-width: 310px; color: #52778e; text-align: center; font-size: 12px; line-height: 1.75; }
.qr-action-note { display: flex; align-items: center; justify-content: center; gap: 9px; margin: 20px auto 0; color: #2c9ebd; font-size: 11px; line-height: 1.6; letter-spacing: .06em; }
.qr-action-note b { font-size: 16px; font-weight: 400; }
.personal-card { min-height: 0; padding: 20px 24px; }
.personal-contact { display: flex; align-items: center; gap: 18px; margin-top: 18px; }
.personal-qr-wrap { width: 96px; height: 96px; flex: 0 0 96px; padding: 5px; background: #fff; border: 1px solid rgba(11, 23, 33, .18); border-radius: 4px; }
.personal-copy { flex: 1; }
.personal-copy p { margin: 0; color: #52778e; font-size: 12px; line-height: 1.75; }
.personal-copy .qr-action-note { justify-content: flex-start; margin: 12px 0 0; font-size: 10px; }

.site-footer { padding: 54px 0 30px; }
.footer-main { display: flex; align-items: center; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid var(--line-dark); }
.brand-footer { flex: 0 0 auto; }
.footer-main > p { margin: 0; color: rgba(243, 250, 249, .66); font-family: var(--serif); font-size: 16px; line-height: 1.6; letter-spacing: .025em; }
.footer-top { margin-left: auto; color: var(--cyan); font-size: 12px; letter-spacing: .1em; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 24px; color: rgba(164, 239, 225, .5); font-size: 12px; line-height: 1.7; letter-spacing: .04em; }

[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].is-visible { opacity: 1; transform: none; }
[data-delay="80"] { transition-delay: 80ms; }
[data-delay="100"] { transition-delay: 100ms; }
[data-delay="120"] { transition-delay: 120ms; }
[data-delay="160"] { transition-delay: 160ms; }
[data-delay="180"] { transition-delay: 180ms; }
[data-delay="240"] { transition-delay: 240ms; }

@media (max-width: 900px) {
  .container { width: min(100% - 48px, 680px); }
  .site-header { padding: 0 24px; }
  .menu-toggle { display: block; }
  .site-nav { position: absolute; top: 72px; right: 24px; left: 24px; display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: 12px; background: rgba(7,24,35,.97); border: 1px solid rgba(164,239,225,.16); box-shadow: 0 18px 36px rgba(4,15,22,.25); opacity: 0; visibility: hidden; transform: translateY(-10px); transition: opacity .25s ease, transform .25s ease, visibility .25s ease; }
  .site-nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .site-nav > a { padding: 14px 12px; }
  .site-nav > a:not(.nav-cta)::after { display: none; }
  .site-nav .nav-cta { margin-top: 6px; text-align: center; }
  .hero { min-height: 760px; height: auto; }
  .hero-content { min-height: 760px; padding-top: 150px; grid-template-columns: 1fr; }
  .hero-copy { padding-bottom: 0; }
  .hero-signals { max-width: 450px; margin-top: 42px; }
  .hero-visual { position: absolute; right: -70px; bottom: 60px; width: 510px; min-height: 470px; opacity: .52; transform: scale(.86); transform-origin: bottom right; pointer-events: none; }
  .hero-foot { bottom: 23px; width: calc(100% - 48px); }
  .split-layout, .section-heading, .news-heading { grid-template-columns: 70px 1fr; gap: 25px; }
  .intro-copy, .section-heading > div:nth-child(2), .news-heading > div:nth-child(2) { grid-column: 2; }
  .info-card, .section-heading .heading-note, .news-heading .heading-note { grid-column: 2; }
  .info-card { margin-top: 35px; }
  .section-heading .heading-note, .news-heading .heading-note { margin-top: 25px; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .capability-card-feature { grid-row: auto; grid-column: span 2; min-height: 380px; }
  .capability-card:last-child { grid-column: 1 / -1; }
  .manifesto-inner, .education-grid, .contact-grid { grid-template-columns: 1fr; gap: 70px; }
  .education-visual { min-height: 410px; }
  .education-copy .section-index { margin-bottom: 38px; }
  .contact-grid { gap: 50px; }
  .contact-qr-stack { width: min(100%, 420px); }
}

@media (min-width: 821px) and (max-width: 900px) {
  .menu-toggle { display: none; }
  .site-nav { position: static; flex-direction: row; align-items: center; gap: 16px; padding: 0; background: transparent; border: 0; box-shadow: none; opacity: 1; visibility: visible; transform: none; font-size: 9px; }
  .site-nav > a { padding: 8px 0; }
  .site-nav .nav-cta { padding: 9px 11px; }
  .hero, .hero-content { min-height: 820px; }
  .hero-copy { position: relative; z-index: 2; max-width: 610px; }
  .hero-visual { right: -150px; bottom: 12px; width: 440px; min-height: 400px; opacity: .36; transform: scale(.72); }
  .orbit-label-b, .orbit-label-c { right: 22%; }
}

@media (max-width: 560px) {
  .container { width: calc(100% - 38px); }
  .site-header { height: 70px; padding: 0 19px; }
  .menu-toggle { display: flex; flex-direction: column; align-items: center; justify-content: center; min-width: 46px; min-height: 46px; padding: 12px; }
  .brand { display: inline-flex; align-items: center; min-height: 44px; }
  .contact-actions .button { min-height: 46px; }
  .text-link { display: inline-flex; align-items: center; min-height: 44px; }
  .site-header.is-scrolled { height: 62px; }
  .site-nav { top: 62px; right: 19px; left: 19px; }
  .brand-logo { width: 120px; max-height: 31px; }
  .brand-footer .brand-logo { width: 142px; }
  .hero-content { min-height: 740px; padding-top: 132px; }
  .hero h1 { font-size: clamp(30px, 8.2vw, 38px); line-height: 1.24; letter-spacing: -.02em; }
  .hero-lede { margin-top: 23px; font-size: 15px; line-height: 1.85; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; margin-top: 28px; }
  .hero-actions .button, .hero-actions .text-link { min-height: 46px; padding-top: 13px; padding-bottom: 13px; }
  .hero-signals { margin-top: 34px; }
  .hero-signal { min-height: 64px; padding-top: 13px; }
  .hero-signal + .hero-signal { padding-left: 12px; }
  .hero-signal strong { font-size: 17px; }
  .hero-signal span { font-size: 9px; }
  .hero-visual { right: -145px; bottom: 49px; transform: scale(.72); }
  .hero-visual-note { display: none; }
  .hero-foot { bottom: 18px; font-size: 8px; gap: 9px; letter-spacing: .1em; }
  .hero-foot-line { width: 24px; }
  .hero-foot > span:nth-child(3) { display: none; }
  .intro, .science-section, .education, .wechat-section { padding: 92px 0; }
  .news-section { padding: 85px 0 100px; }
  .split-layout, .section-heading, .news-heading { grid-template-columns: 1fr; gap: 22px; }
  .section-index { margin-bottom: 15px; }
  .intro-copy, .section-heading > div:nth-child(2), .news-heading > div:nth-child(2), .info-card, .section-heading .heading-note, .news-heading .heading-note { grid-column: auto; }
  .intro-copy h2, .section-heading h2, .education-copy h2, .news-heading h2, .contact-copy h2 { font-size: 40px; line-height: 1.2; }
  .body-large { font-size: 16px; line-height: 1.88; }
  .info-card { margin-top: 25px; }
  .capability-grid { grid-template-columns: 1fr; margin-top: 55px; }
  .capability-card-feature { grid-column: auto; min-height: 350px; }
  .capability-card { min-height: 270px; }
  .capability-card:last-child { grid-column: auto; }
  .manifesto { padding: 100px 0; }
  .manifesto-inner { gap: 48px; }
  .manifesto h2 { font-size: 45px; }
  .education-grid { gap: 45px; }
  .education-visual { min-height: 340px; padding: 20px; }
  .education-visual::before { width: 320px; height: 320px; }
  .education-orbit { width: 190px; height: 190px; }
  .education-orbit b { font-size: 21px; }
  .education-caption { left: 20px; bottom: 18px; }
  .education-caption strong { font-size: 18px; }
  .news-heading { margin-bottom: 45px; }
  .news-item { min-height: 190px; grid-template-columns: minmax(0, 1fr) 44px; gap: 10px; padding: 20px 0; align-items: start; }
  .news-item:hover { padding-left: 0; padding-right: 0; }
  .news-date { grid-column: 1; display: flex; align-items: baseline; gap: 10px; }
  .news-date strong { font-size: 20px; }
  .news-date span { margin-top: 0; }
  .news-type { grid-column: 1; grid-row: 2; margin-top: 2px; }
  .news-title { grid-column: 1; grid-row: 3; }
  .news-title h3 { font-size: 20px; line-height: 1.48; }
  .news-arrow { grid-column: 2; grid-row: 1 / span 3; display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; padding: 0; }
  .contact-grid { gap: 45px; }
  .contact-details { margin-top: 24px; }
  .contact-detail { grid-template-columns: 65px minmax(0, 1fr) auto; gap: 10px; min-height: 44px; }
  .contact-detail > span { font-size: 11px; }
  .contact-detail strong { font-size: 14px; line-height: 1.75; }
  .contact-actions { align-items: flex-start; }
  .contact-action-link { min-height: 44px; padding-bottom: 14px; }
  .wechat-card { min-height: auto; padding: 20px; }
  .qr-image-wrap { width: 240px; height: 240px; margin: 26px auto 20px; }
  .wechat-card > p { font-size: 12.5px; }
  .personal-card { padding: 22px 20px; }
  .personal-contact { flex-direction: column; align-items: center; gap: 16px; text-align: center; }
  .personal-copy { text-align: center; }
  .personal-qr-wrap { width: 168px; height: 168px; flex-basis: 168px; }
  .personal-qr-wrap .wechat-qr { width: 100%; height: 100%; }
  .footer-main { align-items: flex-start; flex-direction: column; gap: 22px; padding-bottom: 30px; }
  .footer-top { margin-left: 0; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
  .map-core { animation: none; }
}

/* ==========================================================================
   TYPO LAYER ① 行高分级 + 字距分档     2026-09-19（整块删除即回滚）
   实测基线 @1440：行高散成 17 档(1.12~1.98)；统计数字块 1.75（数字之间散开）；
                  正文 7 种行高；字距同一层级出现 -.035/-.025/-.02em 三种
   目标：大标题 1.28 ｜ 小标题 1.4 ｜ 正文 1.8 ｜ 小字 1.6 ｜ 大数字 1.1 ｜ 按钮 1.4
   ========================================================================== */

/* ①-1 大数字 / 统计值 1.75 → 1.1 */
.hero-signal strong,
.orbit-label strong,
.approach-item strong,
.news-date strong,
.info-card-number,
.education-caption strong,
.education-orbit b { line-height: 1.1; }

/* ①-2 大标题统一 1.28（原 1.12 / 1.2 / 1.23 混用；中文 60px+ 用 1.12 会挤笔画） */
.hero h1,
.intro-copy h2, .section-heading h2, .education-copy h2, .news-heading h2,
.manifesto h2,
.contact-copy h2 { line-height: 1.28; }

/* ①-3 小标题统一 1.4（原 1.35 / 1.38 / 1.4 / 1.45 / 1.48） */
.info-card h3, .capability-card h3, .news-title h3 { line-height: 1.4; }

/* ①-4 正文统一 1.8；深色底 1.85 补偿 */
.body-large, .hero-lede, .info-card p, .capability-card p, .news-title p,
.heading-note, .body-muted, .contact-copy > p:not(.eyebrow):not(.contact-note),
.contact-guidance, .contact-note { line-height: 1.8; }
.manifesto-copy > p:last-child { line-height: 1.85; }

/* ①-5 小字 / 标签 / 按钮：1.55~1.75 → 1.6 / 1.4 */
.eyebrow, .wechat-card > p, .personal-copy p, .qr-action-note,
.approach-item small, .contact-detail strong,
.footer-main > p, .footer-bottom { line-height: 1.6; }
.button { line-height: 1.4; }

/* ② 字距归一为 em 分档（随字号缩放，不再出现同层级多值）
     大标题 -.02em ｜ 小标题 -.01em ｜ 正文 .012em ｜ 小字 .01em ｜ 标签 .16em ｜ 大数字 -.01em */
.hero h1, .manifesto h2,
.intro-copy h2, .section-heading h2, .education-copy h2, .news-heading h2,
.contact-copy h2 { letter-spacing: -.02em; }
.info-card h3, .capability-card h3, .news-title h3 { letter-spacing: -.01em; }
.body-large, .hero-lede, .info-card p, .capability-card p, .news-title p,
.heading-note, .contact-copy > p:not(.eyebrow):not(.contact-note),
.manifesto-copy > p:last-child { letter-spacing: .012em; }
.body-muted, .wechat-card > p, .personal-copy p,
.contact-guidance, .contact-note { letter-spacing: .01em; }
.hero-signal strong, .orbit-label strong, .news-date strong,
.info-card-number, .education-caption strong, .approach-item strong { letter-spacing: -.01em; }
.eyebrow, .section-index span, .card-kicker, .capability-top, .news-type,
.wechat-card-head, .education-caption span, .approach-item > span,
.orbit-label span { letter-spacing: .16em; }

/* ==========================================================================
   TYPO LAYER ② 孤行治理 + 小字可读性 + 对比度   2026-09-19（整块删除即回滚）
   实测基线：末行占比最低 8.2%（12px 段落末行只剩 24px ≈ 2 字）；
             8px 文字 4 处（"Understand life" / "LIFE SCIENCE / CHENGDU"）；
             浅底小字对比度 3.38 / 4.07 / 4.16 / 4.27 —— 均低于 AA 4.5
   ========================================================================== */

/* ③ 孤行治理：正文/列表 pretty，标题/按钮 balance */
p, li, dd, figcaption,
.body-large, .body-muted, .heading-note, .contact-guidance, .contact-note,
.wechat-card > p, .personal-copy p, .info-card p, .capability-card p,
.news-title p, .approach-item small, .footer-main > p { text-wrap: pretty; }
h1, h2, h3, .button, .text-link, .contact-action-link { text-wrap: balance; }

/* ④ 小字可读性底线：8px → 10px（8px 中文不可读）；9px 标签并到 10px；半像素收回 */
.orbit-label small, .hero-visual-note, .hero-foot { font-size: 10px; }
.section-index small { font-size: 10px; }
.hero-signal span { font-size: 10px; }
.wechat-card > p { font-size: 13px; }
.section-index span, .section-index small, .info-card-tags span, .card-source,
.news-date span, .education-points span, .hero-signal span, .hero-foot,
.hero-visual-note, .orbit-label span, .orbit-label small, .wechat-card-head { line-height: 1.6; }

/* ⑤ 浅底小字对比度补齐到 AA 4.5（深色导航栏上的浅色字属渐变背景误报，不改） */
.news-date span { color: #5b7680; }
.card-source, .info-card-tags span { color: #2f6c89; }
.news-type, .contact-detail > span { color: #2f6c89; }
.news-date strong { color: #35718f; }